Vehicle head lamp



Nov. 22, 1927.

W. C. THOMAS VEHICLE HEADLAMP Filed Feb, 1926 William (T flamed W.- Zv. WW

Guam;

Nov. 22, 192?.

'WILIiIAM G. THOMAS 0F COLUMBUS, OHIO,

ASSiGINDB, TornEIJoHn w. Bnowiv Manu- P ATEENT OFF;

FACTURING- GOMZPANY, OF GOLUMBUSgQHIQ ACORPORATION OF'OHIO.

vnnrcnn Jinan LAMP.

Application filed February This invention relates to improvements motor vehicle head lamps and is especially directed to the provision of anmproved of the lamp so as to secure a desired focal relationship between the light source-rand its accompanying reflector.

With these and other objects in V ew, as will appear as the-descriptionproceeds, the invention consists in the novel features or construction, combinations of elements and arrangements of parts hereinafter to be fully described and pointed out in the ap-.

pended claims.

In the accompanying drawing: j j

Figure 1 is a vertical longitudlnal sectional View taken through the head lamp and illustrating the bulb mounting compr1s ing the present invention therein,

Figure 2 is-a fragmentary vrcw disclosing the adjusting means from the rear of the lamp,

Figure 3 is a vertical transverse sectional view taken on the plane indicated by the line 3-3 of Figure 1, v

Figure l is a. transverse sectional View on the line 4.& of Figure 1.

Referring more particularly to the drawing, the numeral 1 designates a lamp casing of any desired exterior configurat on. Within the casing there is mounted stationarily the usual parabolic reflector 2, having its open front end closed by a lens mounted in connection with the removable lens ring 3 detachably carried bythe open front end of the casing.

The reflector is providedwith an axlal opening 4; in which is mounted a sleeve 5, the opening 4 being of such diameter as to permit ofrocking movement of the sleeve 5 therein to a. limited extent. The sleeve 5 is provided with the usual bayonet slot tor the removable reception of a pin 6 earned by the base of the incandescent lamp 7.

Connected with the sleeve 5 is a guard 8 and disposed between the guard 8 and the sleeve 17,19 6. Serial1T0- 88, 53-

i 5 is a bracket 9, which terminates" rear,-

wardly in a substantially U shapedportion l0. s This portion of the bracketis interiorly threaded for the reception of an adjusting screw 11, the shankfot which projects through an elongated slot 12' provided in the'rear wall 13 of the casing 1, the outer end of thescrew bcing'headed as at 14 and i i of] greater dl'ameter-than'the width of the slot Maniiestly, 'by rotating the screw 11 longitudinal movement will be imparted tothe bracket 79 and theiconnected sleeve 5 so as tomove thelanip 7 longitudinally with respect to the principal axis of the reflector, therebeing a coil spring 15 positioned between theU portion 10 of the-bracket 9 and the Wall '13 for the purpose of retaining the bulb in its adjusted position and preventing undue rotation on the part of the screw '11.

I rd r to cally and to occupy a position either below or above the plane of the principal axis of the reflector the present invention contemplates the provision of such structure comprising a fleinble ad usting strip 16. This strip is arranged wlthln the lamp caslng and has its lower end fastened or riveted thereto as at 17. Immediately above its point of connection, as at 17, with the lamp casing the strip is bowed to produce an outwardly directed q cillat th lee 5 ver i to thereby adjust the light source zone 18 and this portion of the strip then terinmates in an upwardly directed flattened eX- I tremity which presses upon'the rear Wall of the casing, the extreme upper end being provided with an opening 19 for the accommodation of the screw 11, the diameter'of the opening 19 corresponding closely to that of said screw. Swiveled in connection with the bowed portion 18' of the strip is a nut 20 threaded to receive a second adjusting screw 21 which, in turn, has the headed end 22 thereof swiveled in connection with the rear wall of the casing. It will be apparent that a by rotating the screw 21 the nut 20 may be advanced longitudinally thereof so as to flex or release the bowed portion 1.8 of the strip 16 and to thereby provide an adjustment for governing the effective length of said strip so as to raise or lower the screw 11 in the slot 12 provided therefor in the rear wall of the casing. By thus varying the effective length of said strip the sleeve 5 may be rocked in a vertical plane so as to oscillate the lamp 7, enabling the filament thereof to tend above or below the horizontal level of the lamp. i

What is claimed is': V p

1. In a vehicle head lamp, a casing, a reflector therein providedwith' an axial opening, a lamp support adjustably mounted in said opening, an adjusting screw arranged co-axially with respect to said support tor moving the latter longitudinally, a strip mounted Within said lamp and formed with a bowed resilient portion, the outer end of said strip being engaged with said screw, and means for flexing the bowed portion of said strip to regulate-the effective length thereof and to thereby govern the axial relation between said support and said reflector.

2; In a'vehicle head lamp, a casing, a refieetor mounted within said casing, a bulb support adjustably mounted in an opening rovided in said. refiector,a bracket carrie 36f Ey jsa'id support, an exteriorly actuated screw engaged with said bracket and arranged in axial alignment with said support to move the latter longitudinally, a strip secured at ,one end to said casing and formed to include a'bowed res hent portion and a free outer portion engaged with said screw, and an exteriorly operated ad ustmg means for flexing the bowed portion of said strip to regulate its effective length whereby said support may be oscillated vertically with respect to'said reflector.

3. In a vehicle head lamp, a casing, arefle'ctor within said casing and provided with an axial opening, a bulb support movable horizontally and vertically with respect to said reflector, an exteriorly actuated screw projecting through a'slot provided in said casing and having the inner end thereof threadedly engaged with said support to adjust the latter longitudinally, a strip fixed to said casing and having a bowed portion and an outer free end'engaged with said screw,

andexteriorly operable adjusting means for flexing the bowed portion of said strip to vary the efiective length thereof whereby said screw is vertically adjusted to rock said support relative to the reflector.

In testimony whereof I aflix my signature.

WILLIAM C. THOMAS. 

